Non-normal oil leakage is definitely not a good thing for the car. You said the oil seal oil leakage oil, oil seal leak oil, then cause the bearing deficiency, the bearings will send cards, fever, crane, causing the bearing card dead It is big to have a big impact on this step.

Oil seal sealing principle: This oil film has fluid lubrication characteristics due to an oil film controlled between the oil seal and the shaft. Under the action of liquid surface tension, the stiffness of the oil film exactly forms a new moon surface with the air contact end to prevent leakage of the working medium, thereby achieving the rotating shaft. The oil seal is sealed, depending on the thickness of the sealing surface oil film, too large, oil seal leakage; too small thickness, dry friction, causing oil seals and axis wear; there is no oil film between the sealing lip and the shaft, it is easy to cause heat, wear .